Automatically threading loom shuttle



0d. 3, 1933. R JENKINS 1,928,787

AUTOMATICALLY THREADING LOOM SHUTTLE Filed Dec. 29. 1932 F1712. Fig.3.

W/TNESS INVENTORW CLINTON J. Coal/e N. EA. dE/v/r/NS.

ATTORNEY.

Patented Oct. 3, 1933 ,APATENT OFFICE AUTOMATICALLY THREADING LOOM SHUTTLE Roy A. Jenkins Fall River, Mass., assignor to Draper Corporation, Hopedale, Mass., a corporation of, Maine Application December 29, 1932 1 Serial No. 649,365

4 Claims. (01. 139-22s The present invention relates to automatically threading loom shuttles and has more particular reference to the provision of means for insuring the proper positioning of the filling thread in 5 the threading block thereof.

The preferred embodiment of my invention is illustrated in the accompanying drawing, in which:

Fig. 1 is a plan view of the forward, or thread delivery end of a shuttle embodying my invention;

Fig. 2 is a perspective view of the threading block detached from the shuttle; and

Fig. 3 is a view, in elevation, of the threading scroll and guard member constructed in accordance with my invention.

The shuttle 1 shown in the drawing is of the usual type employed in bobbin changing looms, being provided with means for holding an automatically replenished filling carrier 2, a threading block 3, and a side delivery eye 4. The shuttle is provided with a longitudinally extending thread passage 5 constituted in part by the walls 6, '7 of the threading block 3 and, in part, by the walls 8, 9 formed in the shuttle proper.

On the first pick after filling replenishment, the filling thread extends from the carrier 2, through the thread passage 5 and to a fixed holder (not shown). 0n the next pick the thread, being engaged beneath the point or horn 10, slides down the opening 11 into the side eye 4, at which time the shuttle is fully threaded. In order to control the position of the thread in the passage 5, both during and after the threading operation, the shuttle must be provided with a suitable guiding device, which may be positioned directly in the thread passage.

The guiding device which I prefer to use, without limiting myself thereto, is comprised of a threading scroll embodying the invention disclosed in E. S. Stimpson Patent 1,483,492, dated Feb. 12, 1924. The particular scroll shown is constructed for use with a filling carrier having a so-called left-hand wind of the filling thereon, as in Kavanagh Patent 1,538,639, granted May 19, 1925. It will be apparentthat my invention is notlimited to shuttles adapted only for use with left-hand wind filling.

The threading scroll 12 is secured in the threading block in any suitable usual manner, and may have a substantially vertical wall, preferably considerably higher than the usual corresponding 'curved wall, which wall 13 is spaced from the contiguous wall 6, 8 of the thread passage, thus leaving a gap therebetween. From the top of the wall 13 the scroll curves laterally, downwardly and forwardly as indicated at 14 and the edge 15 thereof is similarly curved, thus forming a thread casting and guiding device as taught in the said Stimpson patent. The curved portion of the threading scroll differs from similar devices of the prior art, in that the downward curve of the present scroll is more pronounced, being approximately vertical for an appreciable distance. The result is that, in the threading operation, once the swirling thread enters the space between the scroll and the wall 7, 9 of the thread passage 5 it will not be apt to rise out of such space, but will readily pass downwardly and laterally beneath the point of the scroll into the interior thereof.

The relatively tall, thin form of the threading scroll, particularly resulting from the substantially vertical wall 13, necessitates the placing of the wall 13 fairly close to the longitudinal axis of the shuttle, in order to better control the thread during normal operation of the shuttle. The resulting gap between the wall 13 and wall 6, 8, above mentioned, offers an opportunity for the thread to become lodged therein during the threading operation. If this should happen, the

filling thread would not be payed out under proper tension and would soon become pinched or chafed, and broken.

I propose to overcome this objectionable condition by providing a member for bridging the gap between the back of the scroll and the contiguous wall of the thread passage. To this end, bridging member 16 may be formed integrally with the top of the wall 13 and extend upwardly and laterally therefrom to engage in a notch 1'7 formed in the wall 8. The member 16 extends upwardly, as well as laterally, in order that no flat step or shelf may be left for the thread to ride on in its passage toward the point of the shuttle.

Having fully disclosed the preferred embodiment of my invention, I claim:

1. An automatically threading loom shuttle having a threading block secured therein, said shuttle and threading block being provided with a thread passage extending longitudinally of the shuttle, a threading scroll positioned within said thread passage and spaced from the walls thereof, and a member extending laterally from the scroll and-bridging the gap between the back of the scroll and the contiguous wall of the thread shuttle and threading block being provided with a thread passage extending longitudinally of the shuttle, a thread casting and guiding scroll positioned within said thread passage and spaced from the walls thereof, and a member integral with the scroll and bridging the gap between the back of the scroll and the contiguous wall of the thread passage and preventing the thread from entering into said gap.

3. An automatically threading loom shuttle having a threading block secured therein, said shuttle and threading block being provided with a thread passage extending longitudinally of the shuttle, a thread casting and guiding scroll positioned within said thread passage and spaced from the walls thereof, said threading scroll being comprised of a member having a substantially vertical wall merging at the top thereof with a laterally, downwardly and forwardly curved thread casting portion, and a member extending laterally from the top of said vertical wall and bridging the gap between said wall and the contiguous wall of the said thread passage to thereby prevent the thread from entering into said gap.

4. An automatically threading loom shuttle having a threading block secured therein, said shuttle and threading block being provided with ROY; A. JENKINS. 

